JPH02118575U

JPH02118575U -

Info

Publication number: JPH02118575U
Application number: JP2664289U
Authority: JP
Priority date: 1989-03-10
Filing date: 1989-03-10
Publication date: 1990-09-25

Description

[Brief explanation of the drawing]

第１図は、本考案に従つて構成されたボウリン
グボールの一具体例を示す断面図。２……ボウリングボール、４……中央コア、６
……中間層、８……表面層、１０……核部、１２
……重量調整部。 FIG. 1 is a sectional view showing a specific example of a bowling ball constructed according to the present invention. 2...Bowling ball, 4...Central core, 6
...middle layer, 8 ... surface layer, 10 ... core part, 12
...Weight adjustment section.

Claims

[Claims for Utility Model Registration] 1. The central core is composed of a core portion made of a material with relatively high specific gravity and a weight adjustment portion made of a material with relatively low specific gravity covering the core portion, and the weight adjustment portion is made of a material with relatively low specific gravity. A bowling ball characterized in that the weight of the entire ball is adjusted by adjusting the weight of the parts. 2. The bowling ball according to claim 1, wherein the core has a specific gravity of 3.5 to 3.9. 3. The bowling ball of claim 2, wherein the core is made of ceramic. 4. The bowling ball according to claim 1, wherein the weight adjustment section has a specific gravity of 0.8 to 1.8. 5. The bowling ball according to claim 4, wherein the weight adjustment portion is made of urethane elastomer. 6. A claim in which an intermediate layer made of a synthetic elastomer with relatively high hardness is provided on the outside of the central core, and a surface layer made of a synthetic elastomer with relatively low hardness is further provided on the outside of the intermediate layer. Items 1 to 5
A bowling ball as described in any of the above.